Negative effects derived from exposure to cuils are commonly referred to as cuil sickness. The effects of high exposure to Cuils can be incredibly damaging. By definition anomaly is a vast expanse of foreign forces of nature acting upon you and the environment. Overexposure will induce a spectrum of negative effects dependent on the species and potency of the cuil exposure.
To organics, high or prolonged exposure can incur both physical and psychological damage. At any ECF higher than one, cancerous and noncancerous growths may occur as the body starts undergoing minute ‘errors’ in its functioning and makeup— this is known as ‘cuil cancer,’ and becomes worse and more common as ECF rises. Once the ECF hits 6 cuils, however, more effects begin to appear as the individual contracts ‘cuil overdose syndrome.’ Sufferers may begin experiencing anxiety, shortness of breath, hallucinations, seizures, paralysis, delusions of grandeur and even total organ failure if the exposure is for too long. Synthetics have their own version of this syndrome that manifests at five cuils instead— sufferers experience memory/file corruption, motor and mobility issues, vision loss, battery health degradation and fatal processor damage. Exposure to ECFs above eleven is extremely dangerous. This is when both organics and inorganics experience “retour al vide,” a rare and lethal condition in which chunks of the victim’s body are sucked out of realspace and enter hyperspace instead. This continues even after the individual is killed, until no atom from the victim’s body is left in realspace.
Psions are more at risk than most, as psionics derives from anomaly, and thus the psion is under nigh constant exposure, and is incentivized to expose themselves to higher ECFs to strengthen their abilities. They however do not perish as quickly as others would in similar circumstances, as most psions have a very weak cuil resistance that comes with their talents.